package com.smscrypt;

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import android.app.Activity;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import javax.crypto.*;

public class SMScryptActivity extends Activity {
	private SQLiteDatabase keyDB = null; 
	private final String DB_NAME = "db";
	private final String DB_TABLE = "mytable";
	
	private TextView txtTitel, txtMessage;
	private EditText edtPhoneNr, edtMessage;
	private Button btnSend;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        txtTitel 		= (TextView) findViewById(R.id.txtTitel);
        txtMessage 		= (TextView) findViewById(R.id.txtMessage);
        edtPhoneNr		= (EditText) findViewById(R.id.edtPhoneNr);
        edtMessage 		= (EditText) findViewById(R.id.edtMessage);
        btnSend			= (Button) findViewById(R.id.btnSend);
        
        edtPhoneNr.setOnFocusChangeListener(new OnFocusChangeListener() {
			@Override
			public void onFocusChange(View v, boolean hasFocus) {
				if (hasFocus && edtPhoneNr.getText().toString().equals(getString(R.string.enterPhoneNumber)))
					edtPhoneNr.setText("");
				if (!hasFocus && edtPhoneNr.getText().length() == 0)
					edtPhoneNr.setText(R.string.enterPhoneNumber);
			}        	 
        });
        
        edtMessage.setOnFocusChangeListener(new OnFocusChangeListener() {
			@Override
			public void onFocusChange(View v, boolean hasFocus) {
				if (hasFocus && edtMessage.getText().toString().equals(getString(R.string.enterMessage)))
					edtMessage.setText("");
        		if (!hasFocus && edtMessage.getText().length() == 0)
        			edtMessage.setText(R.string.enterMessage);				
			}        	
        });
        
        btnSend.setOnClickListener(new View.OnClickListener() 
        {
            public void onClick(View v) 
            {                
                String phoneNo = edtPhoneNr.getText().toString();
                String message = edtMessage.getText().toString();                 
                if (phoneNo.length()>0 && message.length()>0)                
                    sendSMS(phoneNo, message);                
                else
                    Toast.makeText(getBaseContext(), 
                        "Please enter both phone number and message.", 
                        Toast.LENGTH_SHORT).show();
            }
        });       
        
  

        
        // Create DB if not existent


       RC4 rc = new RC4();
       
       try {
		SecretKey key = rc.genKey();
		byte[] enc = rc.encrypt("BLABLIBLUBB", key);
		txtTitel.setText(String.valueOf(enc.length));
		//txtTitel.setText(rc.decrypt(enc, key));
	} catch (NoSuchAlgorithmException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (InvalidKeyException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (NoSuchPaddingException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (IllegalBlockSizeException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (BadPaddingException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
    }
    
    private void sendSMS(String phoneNumber, String message)
    {        
        String SENT = "SMS_SENT";
        String DELIVERED = "SMS_DELIVERED";
 
        PendingIntent sentPI = PendingIntent.getBroadcast(this, 0,
            new Intent(SENT), 0);
 
        PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0,
            new Intent(DELIVERED), 0);
 
        //---when the SMS has been sent---
        registerReceiver(new BroadcastReceiver(){
            @Override
            public void onReceive(Context arg0, Intent arg1) {
                switch (getResultCode())
                {
                    case Activity.RESULT_OK:
                        Toast.makeText(getBaseContext(), "SMS sent", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
                        Toast.makeText(getBaseContext(), "Generic failure", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_NO_SERVICE:
                        Toast.makeText(getBaseContext(), "No service", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_NULL_PDU:
                        Toast.makeText(getBaseContext(), "Null PDU", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_RADIO_OFF:
                        Toast.makeText(getBaseContext(), "Radio off", 
                                Toast.LENGTH_SHORT).show();
                        break;
                }
            }
        }, new IntentFilter(SENT));
 
        //---when the SMS has been delivered---
        registerReceiver(new BroadcastReceiver(){
            @Override
            public void onReceive(Context arg0, Intent arg1) {
                switch (getResultCode())
                {
                    case Activity.RESULT_OK:
                        Toast.makeText(getBaseContext(), "SMS delivered", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case Activity.RESULT_CANCELED:
                        Toast.makeText(getBaseContext(), "SMS not delivered", 
                                Toast.LENGTH_SHORT).show();
                        break;                        
                }
            }
        }, new IntentFilter(DELIVERED));        
 
        SmsManager sms = SmsManager.getDefault();
        sms.sendTextMessage(phoneNumber, null, message, sentPI, deliveredPI);        
    }
    
}